Chery S11 / Chery QQ. Manual — part 80

Chery QQ Service Manual

See “remove and disassemble” in the evaporator section for details.

Installation

（

1）install the thermistor in the order contrary to removing it.

（

2）evacuate and charge the system according to the above described methods.

6. Refrigeration pipe

Check

（

1）check whether the hoses and the metal tubes leak air with leakage detector.

（

2）check whether each hose clamp or metal tube clamp is fastened. If not, please

fasten them or replace the slack.

Remove

（

1）when regrigerant is recovered with recovery and regenerative unit , you must

follow the operating instruction of the device. The lost oil in compressor must be

measured and make-up the same amount of oil.

（

2）change the faulty hoses or metal tubes.

Note：

The above hoses and metal tubes should be covered with caps quickly when they are

removed to avoid damp and dirt to enter.

Installation

（

1）install the refrigeration pipes in the order contrary to removing it.

（

2）evacuate and charge the system according to the above described methods.

7. Circuit elements

1）air conditioner switch

Check

（

1）remove the negative wire of the accumulator

（

2）remove the unit heater slider and the central decoration

（

3）Remove the air conditioner switch connector, take down the air conditioner

switch.

（

4）check whether terminals’ conduction of the air conditioner switch is correct with

ohm gauge

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Chery QQ Service Manual

Switch

1 2 3 4 5

OFF

●

●

●

ON X

●

●

●

If the air conditioner switch does not conduct, please replace it.

2）high-low pressure protection switch

This car is equiped with the high-low pressure protection switch

check

（

1）check whether switches conduct at normal temperature of about 25℃ when the

air conditioning system is charged with refrigerant properly and the compressor

works.

（

2）the switches should not conduct under the following pressures

Pressure at the high pressure side

Switch

Below 196kPa(0.2kg/㎝

2

)

Over 3140kPa(32kPa/㎝

2

)

non-conducting

3）relay for fan

The relay for air conditioner is located in the box of the fore cabin fuse relay.

Check

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Chery QQ Service Manual

（

1）remove the negative wire of the accumulator.

（

2）remove the relay connector and then remove the relay.

（

3）wiring as shown in the diagram. Check whether the pins ③ and ① are

conducting. If not, please replace the relay.

8.

Compression system

Parts of the compressor must be free from dirt and foreign substance when the

compressor is being maintained. For correct maintenance, the clean tools and work

spots are the most important. The connections and surface of the compressor should

be made clean before maintenance or removing the compressor on any car. Parts of

the compressor should be kept clean at any time. Any resassembled parts must be

washed with methane trioxide, crude gasoline, kerosene or other equivalent solution

and then dried in dry air. Only napped cotton fabric can be used for wiping parts.

Without additional descriptions, removing the compressor from a car and overhauling

it on the work table should follow the below operations. The parts should be prepared

in the order of check. The remaining oil in the compressor should be drained out after

the compressor is removed from a car for maintenance, then the compressor is charge

with new refrigerant.

1）fault diagonosis

Item Troubles

Possible

reasons

Action

1

Compressor has noise Piston,

bearing,

cylinder and/or

crank shaft is out of

condition

replace

2

Electric magnetic cluch

has noise

Working face for

bearing and/or

clutch is out of

condition

replace

3 Insufficient

refrigeration

Gasket and/or reed

valve is out of

replace

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Chery QQ Service Manual

condition

4

No

rotating

Due to item 1

locked

replace

5

Oil or air leakage

Seal is out of

condition

replace

Light maintenance can be done onboard and the refrigerant needn’t be discharged,

while the refrigerant must be discharged in overhaul.

There are three main types of the compressor faults：air leakage, noise and

underpressure. In most cases, air leakage always occurs at the shaft seal. Leakage

detector must be used when leakage is checked. In case of a small amount of

compressor oil leakage from the shaft seal, it is unnecessary to replace the shaft seal.

A little bit of oil leakage from the shaft seal is designed to lubricate the system. So

only when a large amount of oil leakage occurs or air leakage is found with leakage

detector, you can replace the shaft seal. For noise and underpressure, repair should

be done after the fault is confirmed.

2）check compressor

（

1）install manifold pressure meter;

（

2）run the engine with rapid idle speed.

（

3）check the following items for the compressor.

①

reading of the high pressure meter is not lower than the normal value and the

reading of the low pressure meter is not higher than the normal value.

②

metal noise.

③

leakage at the shaft seal.

The compressor should be repaired if any fault above occurs.

Remove

（

1）run the engine with idle speed, turn on the air conditioner for about 10 mins.

（

2）remove the negative wire of the accumulator.

（

3）when regrigerant is recovered with recovery and regenerative unit , you must

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